Synthesia is somewhat outdated, but still available to install, afaics.
On the site, I'd make it possible to open pages for individual apps in new tabs — i.e. make the app titles in the list into proper links, so the user could open the context menu on them or do ctrl/cmd-click.
It seems also that scrolling is overridden in the popup for app details, at least in Firefox Android. This adds nothing, except irritation from nonstandard behavior.